#337FB4#337FB4

#337FB4 is a mid, moderate cyan. Relative luminance 0.192; OKLCH L 57.4% C 0.110 H 242.7°. Best body text is #000000 at 4.84:1 contrast (WCAG AA passes).

Color values

HEX	#337FB4
RGB	rgb(51, 127, 180)
HSL	hsl(205, 56%, 45%)
HSV	hsv(205, 72%, 71%)
CMYK	cmyk(71.7%, 29.4%, 0%, 29.4%)
CIE-LAB	lab(50.89, -5.57, -34.70)
CIE-LCH	lch(50.89, 35.15, 260.88°)
OKLab	oklab(57.37% -0.0506 -0.0981)
OKLCH	oklch(57.37% 0.11 242.7)
XYZ	xyz(17.1897, 19.1759, 45.9666)
Luminance	0.1918 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337FB4 #B46833

analogous

#33B4A8 #337FB4 #333FB4

triadic

#337FB4 #B4337F #7FB433

tetradic

#337FB4 #A833B4 #B46833 #3FB433

square

#337FB4 #A833B4 #B46833 #3FB433

split-complementary

#337FB4 #B4333F #B4A833

monochromatic

#183C55 #255D84 #337FB4 #559DCF #85B8DC

Accessibility & contrast

On white

4.34

#337FB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.84

#337FB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337FB4

4.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337FB4	#FFFFFF	#000000	##000000
##337FB4	1.00	4.34	4.84	4.84
#FFFFFF	4.34	1.00	21.00	21.00
#000000	4.84	21.00	1.00	1.00
##000000	4.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6780B6

Deuteranopia (green-blind)

#5574B3

Tritanopia (blue-blind)

#008C92

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #337fb4;
/* rgb */ color: rgb(51, 127, 180);
/* oklch */ color: oklch(57.4% 0.110 242.7);

Tailwind

colors: {
  custom: {
    50: '#7ba3ca',
    500: '#337fb4',
    950: '#000000',
  },
}

SCSS

$custom: #337fb4;
$custom-light: #7ba3ca;
$custom-dark: #000000;

JSON

{
  "hex": "#337fb4",
  "rgb": {
    "r": 51,
    "g": 127,
    "b": 180
  },
  "hsl": {
    "h": 204.651,
    "s": 55.844,
    "l": 45.294
  },
  "oklch": {
    "l": 0.57368,
    "c": 0.11038,
    "h": 242.7
  },
  "luminance": 0.19178
}

Semantic roles & 50–950 ramp

primary

#337FB4

secondary

#C69B7D

accent

#8649DF

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0A0F13

muted

#7C7F82

Preview Lab

Preview with #337FB4

Body copy rendered with the generated semantic roles for this colour.

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